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kernel/linux-imx6_3.14.28/include/linux/mmc/sd.h 2.67 KB
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  /*
   *  include/linux/mmc/sd.h
   *
   *  Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or (at
   * your option) any later version.
   */
  
  #ifndef LINUX_MMC_SD_H
  #define LINUX_MMC_SD_H
  
  /* SD commands                           type  argument     response */
    /* class 0 */
  /* This is basically the same command as for MMC with some quirks. */
  #define SD_SEND_RELATIVE_ADDR     3   /* bcr                     R6  */
  #define SD_SEND_IF_COND           8   /* bcr  [11:0] See below   R7  */
  #define SD_SWITCH_VOLTAGE         11  /* ac                      R1  */
  
    /* class 10 */
  #define SD_SWITCH                 6   /* adtc [31:0] See below   R1  */
  
    /* class 5 */
  #define SD_ERASE_WR_BLK_START    32   /* ac   [31:0] data addr   R1  */
  #define SD_ERASE_WR_BLK_END      33   /* ac   [31:0] data addr   R1  */
  
    /* Application commands */
  #define SD_APP_SET_BUS_WIDTH      6   /* ac   [1:0] bus width    R1  */
  #define SD_APP_SD_STATUS         13   /* adtc                    R1  */
  #define SD_APP_SEND_NUM_WR_BLKS  22   /* adtc                    R1  */
  #define SD_APP_OP_COND           41   /* bcr  [31:0] OCR         R3  */
  #define SD_APP_SEND_SCR          51   /* adtc                    R1  */
  
  /* OCR bit definitions */
  #define SD_OCR_S18R		(1 << 24)    /* 1.8V switching request */
  #define SD_ROCR_S18A		SD_OCR_S18R  /* 1.8V switching accepted by card */
  #define SD_OCR_XPC		(1 << 28)    /* SDXC power control */
  #define SD_OCR_CCS		(1 << 30)    /* Card Capacity Status */
  
  /*
   * SD_SWITCH argument format:
   *
   *      [31] Check (0) or switch (1)
   *      [30:24] Reserved (0)
   *      [23:20] Function group 6
   *      [19:16] Function group 5
   *      [15:12] Function group 4
   *      [11:8] Function group 3
   *      [7:4] Function group 2
   *      [3:0] Function group 1
   */
  
  /*
   * SD_SEND_IF_COND argument format:
   *
   *	[31:12] Reserved (0)
   *	[11:8] Host Voltage Supply Flags
   *	[7:0] Check Pattern (0xAA)
   */
  
  /*
   * SCR field definitions
   */
  
  #define SCR_SPEC_VER_0		0	/* Implements system specification 1.0 - 1.01 */
  #define SCR_SPEC_VER_1		1	/* Implements system specification 1.10 */
  #define SCR_SPEC_VER_2		2	/* Implements system specification 2.00-3.0X */
  
  /*
   * SD bus widths
   */
  #define SD_BUS_WIDTH_1		0
  #define SD_BUS_WIDTH_4		2
  
  /*
   * SD_SWITCH mode
   */
  #define SD_SWITCH_CHECK		0
  #define SD_SWITCH_SET		1
  
  /*
   * SD_SWITCH function groups
   */
  #define SD_SWITCH_GRP_ACCESS	0
  
  /*
   * SD_SWITCH access modes
   */
  #define SD_SWITCH_ACCESS_DEF	0
  #define SD_SWITCH_ACCESS_HS	1
  
  #endif /* LINUX_MMC_SD_H */